Vehicle Communication Hub Arbitration for Shared Camera Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle control systems experience communication errors due to simultaneous transmission of camera parameters from multiple control units to a shared in-vehicle sensor, particularly when the ignition switch state changes, leading to interference and errors in data transmission.
Innovation Solution
A vehicle control system with a hub unit that manages communication devices between control units and the in-vehicle sensor, enabling or disabling communication functions based on the vehicle's operation state to prevent simultaneous transmission of control information, thereby reducing communication errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple control units can transmit camera parameters to the camera unit simultaneously, then the system's adaptability and responsiveness are improved, but communication errors occur due to simultaneous transmission interference
Solution Approach 1:
The hub unit preliminarily determines which control unit should transmit camera parameters before actual transmission occurs. When the ignition switch transitions from OFF to ON, the hub unit proactively sets the transmission right to the first control unit before the second control unit attempts transmission, preventing simultaneous transmission conflicts and communication errors.
Solution Approach 2:
The hub unit acts as an intermediary between control units and the camera unit. It receives transmission requests from multiple control units, determines which control unit should transmit based on ignition switch state, and forwards parameters only from the authorized control unit to the camera unit, thereby preventing communication conflicts.
2Device complexity
If the system uses a shared in-vehicle sensor among multiple control units, then device complexity is reduced, but communication errors occur due to simultaneous transmission
Solution Approach 1:
The hub unit serves as a mediator that manages communication between multiple control units and the shared camera unit. It controls which control unit can transmit camera parameters at any given time based on ignition switch state, preventing simultaneous transmission to the shared sensor and eliminating communication errors while maintaining the benefit of sensor sharing.
Solution Approach 2:
The system dynamically adjusts transmission rights based on the ignition switch state. The hub unit changes which control unit has transmission privileges depending on whether the ignition is ON or OFF, creating a dynamic arbitration mechanism that prevents conflicts while allowing multiple control units to access the shared sensor under different conditions.
Data Source
AI summary
Provided is a vehicle control system including: a plurality of communication devices each of which is provided between an in-vehicle sensor and a corresponding one of a plurality of control units, and has a control information communication function of transmitting control information from the control unit to the in-vehicle sensor; and a communication control device configured to control the plurality of communication devices. The communication control device sets, in response to an operation state of a vehicle, one of a state in which the control information communication function of one of the plurality of communication devices is enabled and the control information communication function of all of communication devices other than the one of the plurality of communication devices out of the plurality of communication devices is disabled, or a state in which the control information communication function of all of the communication devices is disabled.